The theory he sticks to ______ to be of nouse in our studies.

(2011·全国卷Ⅰ)They ________have arrived at lunchtime but their flight was delayed.

These two kinds of ways are totally different in nature, and we should not _______ the two.

依次填入下面一段文字横线处的语句，衔接最恰当的一组是（ ）讲正气，做事别伪装。 。 。所以，脱掉虚荣，卸下疲惫，展示真实的自我本质，好在裸露的灵魂中看清自己。 ； ；成功时戒骄破满，失败时振作图强，失利时淡泊名利。 ； 。①真正能够打动人心的，还在于朴素自然、真情实感与鲜明独特的个性②一个人做点善事与诚恳对人也不难，难就难在做到正直与大度③追求时持之以恒，做错事勇于检讨，有成绩从不炫耀④如果层层包裹，便会裹住了灵性，淹没了精神，掩盖了实质和内容⑤做事时坦荡直率，取得时堂堂正正，舍弃时毫不犹疑⑥一个人做点好事并不难，难的是一辈子做好事，不做坏事

(2010·上海)Wind power is an ancient source of energy ________ we may return in the near future